Question

The interior angles of triangles are (3x-10), (3x+10), (3x).Find the angles

Answer 1

we can solve in this way

Answer 2

we will use angle sum property which is
 =>sum of interior angles of a triangle = 180
(3x-10)+(3x+10)+3x=180
9x=180
x=20
so the angles are   (3x-10)=3*20-10=50
                               (3x+10)=3*20+10=70
                                 3x=3*20=60       answer